(Portland, OR) -- A Portland teacher strike is still planned for Thursday as the teachers union and the Portland school district continue to negotiate a new contract. Both sides are hoping to reach a tentative agreement that would halt the strike by the union's 29-hundred teachers. Should a strike move forward, PPS says it will close schools tomorrow, Thursday, Friday, and Monday to prepare replacement teachers and support personnel. Teachers and organizers are preparing signs in the event of a walkout.